Varied Thrush

Ixoreus naevius

The haunting songs of the Varied Thrush echo through the dense humid forests of the Pacific Northwest. Long minor-key whistles repeated after deliberate pauses, they seem like sounds without a source; only a careful searcher will find the bird itself. Although it looks superficially like a robin, the Varied Thrush is far more elusive, usually feeding on the ground among dense thickets. Typical of the far west, it sometimes surprises birders by straying all the way to the Atlantic Coast in winter.

Conservation status

Could be vulnerable to loss of habitat through cutting of northwestern forests. Currently still common.

Thick, wet forest, conifers; in winter, woods, ravines, thickets. Breeds in coniferous forest of various types, but most common in dense, wet forest near the coast, in areas of fir, hemlock, and spruce with dense understory. In migration and winter favors coniferous woods but also occurs in undergrowth of other woods, especially near streams.

The haunting songs of the Varied Thrush echo through the dense humid forests of the Pacific Northwest. Long minor-key whistles repeated after deliberate pauses, they seem like sounds without a source; only a careful searcher will find the bird itself. Although it looks superficially like a robin, the Varied Thrush is far more elusive, usually feeding on the ground among dense thickets. Typical of the far west, it sometimes surprises birders by straying all the way to the Atlantic Coast in winter.

Photo Gallery

Feeding Behavior

Does much foraging on the ground, usually under dense cover but sometimes on open lawns; may use its bill to toss leaf-litter aside as it searches for insects. Feeds on berries either in trees and shrubs or after they fall to ground.

Eggs

3-4, sometimes 2-5. Pale blue, lightly dotted with brown. Incubation is by female, probably about 2 weeks. Young: Both parents feed nestlings. Development of young and age at which they leave the nest are not well known. Probably 2 broods per year.

Young

Both parents feed nestlings. Development of young and age at which they leave the nest are not well known. Probably 2 broods per year.

Diet

Mostly insects and berries. Feeds on many insects, especially in summer, including beetles, ants, caterpillars, crickets, and many others; also eats many millipedes, sowbugs, snails, earthworms, spiders, other invertebrates. Berries and wild fruits make up majority of winter diet, also eats some seeds and acorns.

Nesting

Male sings in spring to defend territory, singing most frequently at dawn and dusk and after a rain. Nest: Usually placed in conifer, at base of branches against trunk, 5-15' above the ground. Sites vary: Occasionally much higher; especially in far north, may nest very low in deciduous thickets or on the ground. Nest (probably built by female) is a bulky open cup of twigs, moss, leaves, and bark fibers, lined with softer materials such as grass and rootlets.

Migration

Migrates relatively late in fall and early in spring. Numbers present in southern wintering areas quite variable from year to year. A few stray far to the east every year in fall and winter, some reaching New England.

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Migration

Migrates relatively late in fall and early in spring. Numbers present in southern wintering areas quite variable from year to year. A few stray far to the east every year in fall and winter, some reaching New England.

All Seasons - Common

All Seasons - Uncommon

Breeding - Common

Breeding - Uncommon

Winter - Common

Winter - Uncommon

Migration - Common

Migration - Uncommon

Songs and Calls

Song 2 or 3 buzzy whistles, each drawn out until it fades away, followed by a short silence. Call a low took.

How climate change could affect this bird's range

In the broadest and most detailed study of its kind, Audubon scientists have used hundreds of thousands of citizen-science observations and sophisticated climate models to predict how birds in the U.S. and Canada will react to climate change.

Varied Thrush

Each map is a visual guide to where a particular bird species may find the climate conditions it needs to survive in the future. We call this the bird’s “climatic range.”

The colors indicate the season in which the bird may find suitable conditions— blue for winter, yellow for summer (breeding), and green for where they overlap (indicating their presence year-round).

The darker the shaded area, the more likely it is the bird species will find suitable climate conditions to survive there.

The outline of the approximate current range for each season remains fixed in each frame, allowing you to compare how the range will expand, contract, or shift in the future.

The first frame of the animation shows where the bird can find a suitable climate today (based on data from 2000). The next three frames predict where this bird’s suitable climate may shift in the future—one frame each for 2020, 2050, and 2080.

You can play or pause the animation with the orange button in the lower left, or select an individual frame to study by clicking on its year.

The darker the color, the more favorable the climate conditions are for survival. The outlined areas represent approximate current range for each season. More on reading these maps.

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